As I detailed in my reply to your other post, I have mine pretty much all the way to the desk and haven't had any problems. The display doesn't have a fan so it isn't active intake of air from the bottom. There isn't a top vent so it is just for some heat/air to passively escape. The speakers are also down there but with the 1/4" space I have is plenty for the general sound to get out and the air to get in. If I want it to sound a bit better, I just lift it up about an inch.